java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c


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This is Ultimate 0.1.24-13a467a-m
[2019-10-14 23:44:14,179 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-10-14 23:44:14,271 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-10-14 23:44:14,298 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-14 23:44:14,298 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-14 23:44:14,300 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-14 23:44:14,300 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-14 23:44:14,300 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-14 23:44:14,300 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-14 23:44:14,301 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-14 23:44:14,301 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-14 23:44:14,301 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-14 23:44:14,301 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-14 23:44:14,302 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-14 23:44:14,302 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-14 23:44:14,302 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-14 23:44:14,302 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-14 23:44:14,302 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-14 23:44:14,303 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-14 23:44:14,303 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-14 23:44:14,303 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-14 23:44:14,303 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-14 23:44:14,303 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-14 23:44:14,304 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-14 23:44:14,304 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 23:44:14,304 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-14 23:44:14,304 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-14 23:44:14,304 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-14 23:44:14,305 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-14 23:44:14,305 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-14 23:44:14,305 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-14 23:44:14,305 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-14 23:44:14,569 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-14 23:44:14,585 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-14 23:44:14,589 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-14 23:44:14,591 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-14 23:44:14,591 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-14 23:44:14,592 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c
[2019-10-14 23:44:14,671 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04b2f1b7/7350976e75c545cf82c712eb51730bf1/FLAG415f3c0e2
[2019-10-14 23:44:15,314 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-14 23:44:15,314 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c
[2019-10-14 23:44:15,332 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04b2f1b7/7350976e75c545cf82c712eb51730bf1/FLAG415f3c0e2
[2019-10-14 23:44:15,564 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04b2f1b7/7350976e75c545cf82c712eb51730bf1
[2019-10-14 23:44:15,574 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-14 23:44:15,575 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-14 23:44:15,576 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-14 23:44:15,576 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-14 23:44:15,580 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-14 23:44:15,581 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:44:15" (1/1) ...
[2019-10-14 23:44:15,585 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5287bcf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:15, skipping insertion in model container
[2019-10-14 23:44:15,585 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:44:15" (1/1) ...
[2019-10-14 23:44:15,593 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-14 23:44:15,692 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-14 23:44:16,384 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 23:44:16,417 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-14 23:44:16,870 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 23:44:16,912 INFO  L192         MainTranslator]: Completed translation
[2019-10-14 23:44:16,913 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16 WrapperNode
[2019-10-14 23:44:16,914 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-14 23:44:16,914 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-14 23:44:16,915 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-14 23:44:16,915 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-14 23:44:16,930 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ...
[2019-10-14 23:44:16,930 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ...
[2019-10-14 23:44:16,979 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ...
[2019-10-14 23:44:16,980 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ...
[2019-10-14 23:44:17,055 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ...
[2019-10-14 23:44:17,094 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ...
[2019-10-14 23:44:17,102 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ...
[2019-10-14 23:44:17,115 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-14 23:44:17,115 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-14 23:44:17,116 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-14 23:44:17,116 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-14 23:44:17,119 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 23:44:17,221 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-14 23:44:17,221 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-14 23:44:17,222 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-14 23:44:17,223 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-14 23:44:17,223 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2019-10-14 23:44:17,224 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2019-10-14 23:44:17,224 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2019-10-14 23:44:17,224 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assume
[2019-10-14 23:44:17,225 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2019-10-14 23:44:17,225 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2019-10-14 23:44:17,225 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2019-10-14 23:44:17,225 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2019-10-14 23:44:17,226 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2019-10-14 23:44:17,226 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2019-10-14 23:44:17,227 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2019-10-14 23:44:17,227 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-14 23:44:17,229 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-14 23:44:17,230 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-14 23:44:19,422 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-14 23:44:19,423 INFO  L284             CfgBuilder]: Removed 0 assume(true) statements.
[2019-10-14 23:44:19,425 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:44:19 BoogieIcfgContainer
[2019-10-14 23:44:19,425 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-14 23:44:19,426 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-14 23:44:19,426 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-14 23:44:19,430 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-14 23:44:19,430 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:44:15" (1/3) ...
[2019-10-14 23:44:19,431 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1365d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:44:19, skipping insertion in model container
[2019-10-14 23:44:19,431 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (2/3) ...
[2019-10-14 23:44:19,432 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1365d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:44:19, skipping insertion in model container
[2019-10-14 23:44:19,432 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:44:19" (3/3) ...
[2019-10-14 23:44:19,437 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c
[2019-10-14 23:44:19,448 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-14 23:44:19,479 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations.
[2019-10-14 23:44:19,491 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 4 error locations.
[2019-10-14 23:44:19,532 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-14 23:44:19,532 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-14 23:44:19,532 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-14 23:44:19,532 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-14 23:44:19,532 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-14 23:44:19,532 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-14 23:44:19,532 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-14 23:44:19,533 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-14 23:44:19,570 INFO  L276                IsEmpty]: Start isEmpty. Operand 447 states.
[2019-10-14 23:44:19,586 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2019-10-14 23:44:19,586 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 23:44:19,587 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 23:44:19,590 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 23:44:19,596 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 23:44:19,596 INFO  L82        PathProgramCache]: Analyzing trace with hash -1062699127, now seen corresponding path program 1 times
[2019-10-14 23:44:19,605 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 23:44:19,606 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420662550]
[2019-10-14 23:44:19,606 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 23:44:19,606 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 23:44:19,607 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 23:44:19,925 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 23:44:20,700 WARN  L191               SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2019-10-14 23:44:20,716 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 23:44:20,771 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 23:44:20,772 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420662550]
[2019-10-14 23:44:20,773 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 23:44:20,773 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 23:44:20,773 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933719546]
[2019-10-14 23:44:20,779 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-14 23:44:20,779 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 23:44:20,793 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-14 23:44:20,794 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-14 23:44:20,796 INFO  L87              Difference]: Start difference. First operand 447 states. Second operand 4 states.
[2019-10-14 23:44:21,375 WARN  L191               SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 281
[2019-10-14 23:44:24,507 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 23:44:24,508 INFO  L93              Difference]: Finished difference Result 697 states and 1222 transitions.
[2019-10-14 23:44:24,508 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-14 23:44:24,510 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 54
[2019-10-14 23:44:24,510 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 23:44:24,542 INFO  L225             Difference]: With dead ends: 697
[2019-10-14 23:44:24,544 INFO  L226             Difference]: Without dead ends: 550
[2019-10-14 23:44:24,551 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2019-10-14 23:44:24,569 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 550 states.
[2019-10-14 23:44:24,627 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 544.
[2019-10-14 23:44:24,629 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 544 states.
[2019-10-14 23:44:24,631 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 719 transitions.
[2019-10-14 23:44:24,633 INFO  L78                 Accepts]: Start accepts. Automaton has 544 states and 719 transitions. Word has length 54
[2019-10-14 23:44:24,633 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 23:44:24,633 INFO  L462      AbstractCegarLoop]: Abstraction has 544 states and 719 transitions.
[2019-10-14 23:44:24,634 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-14 23:44:24,634 INFO  L276                IsEmpty]: Start isEmpty. Operand 544 states and 719 transitions.
[2019-10-14 23:44:24,638 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2019-10-14 23:44:24,639 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 23:44:24,639 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 23:44:24,639 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 23:44:24,640 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 23:44:24,640 INFO  L82        PathProgramCache]: Analyzing trace with hash -194729860, now seen corresponding path program 1 times
[2019-10-14 23:44:24,640 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 23:44:24,640 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318018796]
[2019-10-14 23:44:24,640 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 23:44:24,641 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 23:44:24,641 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 23:44:24,685 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 23:44:25,339 WARN  L191               SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2019-10-14 23:44:25,347 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 23:44:25,367 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 23:44:25,367 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318018796]
[2019-10-14 23:44:25,368 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 23:44:25,368 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 23:44:25,368 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665935472]
[2019-10-14 23:44:25,370 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-14 23:44:25,370 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 23:44:25,370 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-14 23:44:25,371 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-14 23:44:25,371 INFO  L87              Difference]: Start difference. First operand 544 states and 719 transitions. Second operand 4 states.
[2019-10-14 23:44:25,872 WARN  L191               SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 281
[2019-10-14 23:44:27,983 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 23:44:27,983 INFO  L93              Difference]: Finished difference Result 959 states and 1321 transitions.
[2019-10-14 23:44:27,984 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-14 23:44:27,984 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 54
[2019-10-14 23:44:27,985 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 23:44:27,990 INFO  L225             Difference]: With dead ends: 959
[2019-10-14 23:44:27,990 INFO  L226             Difference]: Without dead ends: 718
[2019-10-14 23:44:27,993 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2019-10-14 23:44:27,995 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 718 states.
[2019-10-14 23:44:28,031 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 712.
[2019-10-14 23:44:28,032 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 712 states.
[2019-10-14 23:44:28,035 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 957 transitions.
[2019-10-14 23:44:28,036 INFO  L78                 Accepts]: Start accepts. Automaton has 712 states and 957 transitions. Word has length 54
[2019-10-14 23:44:28,036 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 23:44:28,036 INFO  L462      AbstractCegarLoop]: Abstraction has 712 states and 957 transitions.
[2019-10-14 23:44:28,036 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-14 23:44:28,037 INFO  L276                IsEmpty]: Start isEmpty. Operand 712 states and 957 transitions.
[2019-10-14 23:44:28,042 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2019-10-14 23:44:28,042 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 23:44:28,042 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 23:44:28,043 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 23:44:28,043 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 23:44:28,043 INFO  L82        PathProgramCache]: Analyzing trace with hash 509758050, now seen corresponding path program 1 times
[2019-10-14 23:44:28,043 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 23:44:28,044 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227389199]
[2019-10-14 23:44:28,044 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 23:44:28,044 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 23:44:28,044 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 23:44:28,092 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 23:44:28,755 WARN  L191               SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2019-10-14 23:44:28,764 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 23:44:28,816 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 23:44:28,816 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227389199]
[2019-10-14 23:44:28,817 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 23:44:28,817 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10
[2019-10-14 23:44:28,817 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162520867]
[2019-10-14 23:44:28,818 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-14 23:44:28,818 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 23:44:28,818 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-14 23:44:28,819 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2019-10-14 23:44:28,819 INFO  L87              Difference]: Start difference. First operand 712 states and 957 transitions. Second operand 11 states.
[2019-10-14 23:44:29,389 WARN  L191               SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 290
[2019-10-14 23:44:34,351 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 23:44:34,351 INFO  L93              Difference]: Finished difference Result 2252 states and 3213 transitions.
[2019-10-14 23:44:34,351 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2019-10-14 23:44:34,351 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 54
[2019-10-14 23:44:34,352 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 23:44:34,364 INFO  L225             Difference]: With dead ends: 2252
[2019-10-14 23:44:34,365 INFO  L226             Difference]: Without dead ends: 2121
[2019-10-14 23:44:34,369 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650
[2019-10-14 23:44:34,372 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2121 states.
[2019-10-14 23:44:34,436 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 723.
[2019-10-14 23:44:34,437 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 723 states.
[2019-10-14 23:44:34,440 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 971 transitions.
[2019-10-14 23:44:34,440 INFO  L78                 Accepts]: Start accepts. Automaton has 723 states and 971 transitions. Word has length 54
[2019-10-14 23:44:34,443 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 23:44:34,443 INFO  L462      AbstractCegarLoop]: Abstraction has 723 states and 971 transitions.
[2019-10-14 23:44:34,443 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-10-14 23:44:34,443 INFO  L276                IsEmpty]: Start isEmpty. Operand 723 states and 971 transitions.
[2019-10-14 23:44:34,447 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2019-10-14 23:44:34,448 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 23:44:34,448 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 23:44:34,448 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 23:44:34,448 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 23:44:34,449 INFO  L82        PathProgramCache]: Analyzing trace with hash -1420674109, now seen corresponding path program 1 times
[2019-10-14 23:44:34,449 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 23:44:34,449 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834223378]
[2019-10-14 23:44:34,449 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 23:44:34,449 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 23:44:34,450 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 23:44:34,482 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 23:44:35,112 WARN  L191               SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2019-10-14 23:44:35,119 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 23:44:35,137 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 23:44:35,138 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834223378]
[2019-10-14 23:44:35,139 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 23:44:35,139 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 23:44:35,139 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320579789]
[2019-10-14 23:44:35,140 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-14 23:44:35,140 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 23:44:35,141 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-14 23:44:35,141 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-14 23:44:35,141 INFO  L87              Difference]: Start difference. First operand 723 states and 971 transitions. Second operand 4 states.
[2019-10-14 23:44:35,623 WARN  L191               SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 281
[2019-10-14 23:44:38,498 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 23:44:38,498 INFO  L93              Difference]: Finished difference Result 1390 states and 1920 transitions.
[2019-10-14 23:44:38,499 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-14 23:44:38,499 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 55
[2019-10-14 23:44:38,500 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 23:44:38,507 INFO  L225             Difference]: With dead ends: 1390
[2019-10-14 23:44:38,507 INFO  L226             Difference]: Without dead ends: 1061
[2019-10-14 23:44:38,509 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2019-10-14 23:44:38,511 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1061 states.
[2019-10-14 23:44:38,593 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 1054.
[2019-10-14 23:44:38,593 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1054 states.
[2019-10-14 23:44:38,600 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1429 transitions.
[2019-10-14 23:44:38,600 INFO  L78                 Accepts]: Start accepts. Automaton has 1054 states and 1429 transitions. Word has length 55
[2019-10-14 23:44:38,601 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 23:44:38,601 INFO  L462      AbstractCegarLoop]: Abstraction has 1054 states and 1429 transitions.
[2019-10-14 23:44:38,601 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-14 23:44:38,601 INFO  L276                IsEmpty]: Start isEmpty. Operand 1054 states and 1429 transitions.
[2019-10-14 23:44:38,604 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2019-10-14 23:44:38,605 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 23:44:38,605 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 23:44:38,605 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 23:44:38,605 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 23:44:38,606 INFO  L82        PathProgramCache]: Analyzing trace with hash -1526715040, now seen corresponding path program 1 times
[2019-10-14 23:44:38,606 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 23:44:38,606 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949171556]
[2019-10-14 23:44:38,606 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 23:44:38,606 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 23:44:38,607 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 23:44:38,650 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 23:44:39,360 WARN  L191               SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2019-10-14 23:44:39,370 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 23:44:39,393 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 23:44:39,394 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949171556]
[2019-10-14 23:44:39,394 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 23:44:39,394 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12
[2019-10-14 23:44:39,394 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270190774]
[2019-10-14 23:44:39,395 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 13 states
[2019-10-14 23:44:39,395 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 23:44:39,395 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2019-10-14 23:44:39,396 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156
[2019-10-14 23:44:39,396 INFO  L87              Difference]: Start difference. First operand 1054 states and 1429 transitions. Second operand 13 states.
[2019-10-14 23:44:40,594 WARN  L191               SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 303 DAG size of output: 301
[2019-10-14 23:44:47,033 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 23:44:47,034 INFO  L93              Difference]: Finished difference Result 3825 states and 5350 transitions.
[2019-10-14 23:44:47,034 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2019-10-14 23:44:47,034 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 55
[2019-10-14 23:44:47,035 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 23:44:47,052 INFO  L225             Difference]: With dead ends: 3825
[2019-10-14 23:44:47,052 INFO  L226             Difference]: Without dead ends: 3626
[2019-10-14 23:44:47,054 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870
[2019-10-14 23:44:47,058 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3626 states.
[2019-10-14 23:44:47,152 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 1070.
[2019-10-14 23:44:47,152 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1070 states.
[2019-10-14 23:44:47,157 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1452 transitions.
[2019-10-14 23:44:47,157 INFO  L78                 Accepts]: Start accepts. Automaton has 1070 states and 1452 transitions. Word has length 55
[2019-10-14 23:44:47,159 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 23:44:47,159 INFO  L462      AbstractCegarLoop]: Abstraction has 1070 states and 1452 transitions.
[2019-10-14 23:44:47,159 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2019-10-14 23:44:47,160 INFO  L276                IsEmpty]: Start isEmpty. Operand 1070 states and 1452 transitions.
[2019-10-14 23:44:47,162 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2019-10-14 23:44:47,162 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 23:44:47,162 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 23:44:47,163 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 23:44:47,163 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 23:44:47,163 INFO  L82        PathProgramCache]: Analyzing trace with hash -822227130, now seen corresponding path program 1 times
[2019-10-14 23:44:47,164 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 23:44:47,164 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251172227]
[2019-10-14 23:44:47,164 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 23:44:47,164 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 23:44:47,164 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 23:44:47,205 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 23:44:47,778 WARN  L191               SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2019-10-14 23:44:47,786 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 23:44:47,807 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 23:44:47,807 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251172227]
[2019-10-14 23:44:47,807 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 23:44:47,808 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2019-10-14 23:44:47,808 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379166394]
[2019-10-14 23:44:47,808 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 10 states
[2019-10-14 23:44:47,809 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 23:44:47,809 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2019-10-14 23:44:47,809 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90
[2019-10-14 23:44:47,810 INFO  L87              Difference]: Start difference. First operand 1070 states and 1452 transitions. Second operand 10 states.
[2019-10-14 23:44:48,404 WARN  L191               SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2019-10-14 23:44:52,184 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 23:44:52,185 INFO  L93              Difference]: Finished difference Result 4052 states and 5667 transitions.
[2019-10-14 23:44:52,185 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2019-10-14 23:44:52,185 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 55
[2019-10-14 23:44:52,185 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 23:44:52,200 INFO  L225             Difference]: With dead ends: 4052
[2019-10-14 23:44:52,200 INFO  L226             Difference]: Without dead ends: 3292
[2019-10-14 23:44:52,203 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240
[2019-10-14 23:44:52,206 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3292 states.
[2019-10-14 23:44:52,392 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3292 to 2379.
[2019-10-14 23:44:52,393 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2379 states.
[2019-10-14 23:44:52,400 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 3335 transitions.
[2019-10-14 23:44:52,400 INFO  L78                 Accepts]: Start accepts. Automaton has 2379 states and 3335 transitions. Word has length 55
[2019-10-14 23:44:52,400 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 23:44:52,401 INFO  L462      AbstractCegarLoop]: Abstraction has 2379 states and 3335 transitions.
[2019-10-14 23:44:52,401 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2019-10-14 23:44:52,401 INFO  L276                IsEmpty]: Start isEmpty. Operand 2379 states and 3335 transitions.
[2019-10-14 23:44:52,404 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2019-10-14 23:44:52,404 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 23:44:52,405 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 23:44:52,405 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 23:44:52,405 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 23:44:52,405 INFO  L82        PathProgramCache]: Analyzing trace with hash -1576357576, now seen corresponding path program 1 times
[2019-10-14 23:44:52,406 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 23:44:52,406 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027620998]
[2019-10-14 23:44:52,406 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 23:44:52,406 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 23:44:52,406 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 23:44:52,431 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 23:44:53,013 WARN  L191               SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2019-10-14 23:44:53,021 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 23:44:53,045 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 23:44:53,045 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027620998]
[2019-10-14 23:44:53,045 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 23:44:53,046 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10
[2019-10-14 23:44:53,046 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472232170]
[2019-10-14 23:44:53,046 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-14 23:44:53,047 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 23:44:53,047 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-14 23:44:53,047 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110
[2019-10-14 23:44:53,047 INFO  L87              Difference]: Start difference. First operand 2379 states and 3335 transitions. Second operand 11 states.